Developer testing

I’m working on a plugin and need to see the errors which are generated by the tracking code. So if a visitor visits a given site, I need to see result of the tracking method in my plugin (stored in MyPLugin.php or Archive.php in MyPlugin directory). Is there a way to see the echo / print I generate in these methods? This method works with the Tracker Action record, where $notofocation is sent. I’d like to see also what the $notification holds. Is there any simple solution? Thanks!

If you set $GLOBALS[‘PIWIK_TRACKER_DEBUG’] to true in piwik.php, error messages should show up?